Epson Connect uses unique email address assigned to your printer,
This system does not utilize your normal email address or email program.
Your printer will be assigned an address I.E.:
(e-mail address removed) (or whatever you choose)
You must establish a "User Name" when registering with Epson Connect
I used "(e-mail address removed)" - my normal email address
You must provide password when registering with Epson Connect
Once registration is completed satisfactorily, You can send documents, photos, etc.
addressed to (e-mail address removed). You will send them via your normal email service
The next time your printer is powered on, those files will print out on your printer
Here is thorough explanation and setup instructions:
https://files.support.epson.com/pdf/art1430/art1430ecg.pdf
Regards